Interviews: Hiring Managers Asking Employees About Potential Employees

My question involves labor and employment law for the state of: Montana

I'm interested in learning if it is within a company's legal right to let their teams know the name of a person applying for a position in their department and what they know about a potential new hire. Are they, in any way, bound to confidentiality on applicants prior to an interview? I'm a few days away from a scheduled interview with EEOC regarding age discrimination. Thank you. GGR

Interviews: Hiring Managers Asking Employees About Potential Employees